Processing of spent pickling liquor formed during treatment of titanium products

[摘要] The article presents the research findings on processing of spent acid pickling liquor (SAPL) formed during etching of titanium products. The processing includes neutralizing the SAPL with alkali, filtering, drying and calcining the titanium hydroxide precipitate as well as electrochemical processing of the filtrate in an ion-exchange membrane cell. The proposed SAPL processing procedure allows obtaining titanium dioxide, sodium hydroxide and a mixture of acids. Titanium dioxide can be used in paint-and-varnish industry. The alkali can be used in neutralizing the SAPL. A mixture of acids is suitable for use in etching process of titanium products.

[发布机构] Sterlitamak Branch of Ufa State Petroleum Technological University, 2, October Av., Sterlitamak, Bashkortostan; 453118, Russia^1

[效力级别] 电工学

[关键词] Electrochemical processing;Etching process;Processing procedures;Spent acid;Spent pickling liquors;Titanium hydroxides